A Newly Developed Rice Variety,Tainan 16
Chen, R. K. , Y. R. Lin and J. C. Lo
A new rice variety “Tainan 16” which original line was NKY1001044, was released by Tainan District Agricultural Research and Extension Station. Tainan 16 possessed the excellent eating quality of japonica rice variety, Koshihikari, but without photoperiod sensitivity, leading to cultivated in Taiwan broadly. Koshihikari, serving as the female parent, was crossed to Tainung 67 (TNG 67), serving as the male parent, in the second crop season of 2007, then the F1 was backcrossed to the recurrent parent, Koshihikari, for four times. The progeny of each generation, BC1F1, BC2F1, BC3F1, and BC4F1, were selected for backcross by implementation of marker-assisted selection, for which three heading date alleles of TNG 67 were used as foreground selection, homozygous Koshihikari genotypes of markers covered rice genomes were used as background selection. Nine selected BC4F2 individuals were planted in first crop season of 2010 and were assessed for agronomic traits, yield components, and grain quality in the second crop season of 2010 and first season crop of 2011. As the result of assessments, NKY1001044 was selected for further evaluation. NKY1001044 is a middle-late mature and headed later than Koshihikari did for 13.3-20.4 days. The grain appearance of NKY1001044 is translucent and less chalky. In addition, the eating quality of NKY1001044 was better than Koshihikari’s with 30% more grain yield. In May 28, 2012, NKY1001044 was registered as “Tainan 16” by the agreement of the Committee of Registration for New Rice Varieties of the Tainan District Agricultural Research and Extension Station. We expect that the release of “Tainan 16” can establish a local brand of rice variety and enhance the grain quality of rice industry continuously. Moreover, “Tainan 16” could increase the revenue of farmers and strengthen the competence of rice industry.
Key words：Japonica rice, Tainan 16, Breeding,
Marker-Assisted Selection, Grain quality
Accepted for publication：September 13, 2012